"No lag...Love it...On the laptops the mouse was smooth and fast....Feel: For a wireless mouse of this price point I would have expected the plastics to be brushed or feel a little more lux than they do, but it has a standard issue mouse feel The optional weight gives it some heft which is nice, and without it it's VERY easy to almost send skittering across your desk."
I just upgraded an older Z170 chipset P870DM3 (which Sager calls the 9873) with 9900K. +100% CPU power upgrade over 6700K. Ran a bench at 4.9ghz allcore this morning. Others have demonstrated the current Z370 P870TM model with >5ghz 9900K. (This same model was DAILYING 8700K at 5Ghz for 6 months before laptop coffeelake came along and boy it was a huge deal when ONE or TWO of the BGA i9's completed a short bench at 5ghz!). Utter beastly pieces of engineering, that make everything BGA else look puny by comparison. For sure they suck at portability, but if you don't place such a high importance on that, and you're talking best performance, this is it
We put the contenders through much of the same rigorous testing as we do with our best gaming laptops. We tested each by playing half an hour of Overwatch on high settings—a popular game, but not too taxing—and then tested our finalists with a more graphically demanding game by playing 30 minutes of The Witcher 3 on ultra with VSync off. We also played Overwatch and Doom extensively to test how our finalists held up during longer gaming sessions.

Gaming laptops can put a serious dent in your wallet, with some of the fancier models costing upward of $3,000. But who says that the right rig has to cost an arm, a leg and the soul of your firstborn? Fortunately for the fiscally conscious gamer, there are some sub-$1,000 notebooks that can run graphically taxing games like Destiny 2 and Shadow of the Tomb Raider at solid frame rates.